Solitaire is capeable to lay 60" pipe for transoceanic pipelines - that is already hyperloop size…
One of the things that is much easier on the ocean than on land is putting tubular connetions that bridge big distances.
Solitaire is a floating factory that produces pipelines in an endless process while it moves on.
It is currently used for pipes that transport stuff like oil and gas, but it is certainly not far fetched to assume, that it could also be used (with few adaptions) to build oceanic hyperloop connections really fast and really cheap.
The hyperloop connections between New Venice and New Atlantis will be much more economic than a new highway between Washington and New York.